Implement cross chain lp feature for front end

[FezBox]

here is the doc with what has been built
https://github.com/balancednetwork/balanced-java-contracts/blob/feature/crosschain_lp/crosschainlp.md

[parrot9design]

Cross-chain liquidity design

The Supply tab just needs a small update to make sure the second asset is always set to the same chain as the first (remove the blockchain selector and wallet info):

Let's update the confirmation modal to this:

If the pool offers rewards, we should prompt people to stake their LP tokens after they finish supplying liquidity:

Add the asset icons and blockchain to the Your pools` tab in the Liquidity Pools section:

Note that we also want to flip the asset style in the Core pools tab so the primary asset is on top (like what you see above, but without the blockchain logo).

---

Cross-chain rewards

The updated design for the Rewards section includes a blockchain selector and the ability to deposit other stablecoins (USDC, USDT).

Onboarding message shown if you don't have the chosen asset in your wallet:

If you deposit multiple stablecoins into the Savings Rate, they're combined to show you a single $ value, and you can choose which stablecoin to receive when you withdraw. If the active stablecoin has limited availability (not enough to withdraw), there'll be an Available indicator on the slider so you can only withdraw up to that point:

[FezBox]

expect to have a testable front end by the end of this year